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Heart Cut Diamond Size Chart (MM)

Wondering what a 1 carat Heart diamond looks link on a hand? Our Heart diamond size chart will help you convert millimeter (mm) size to carat size for Heart cut diamonds.

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Heart Diamond Sizes

Heart MM
Size
Heart Weight
(ct)
Black Diamond ct
weight (Approx)
Heart MM
Size
Heart Weight
(ct)
Black Diamond ct
weight (Approx)
3.5 mm. 0.18 0.22 8 mm. 2.00 2.80
4 mm. 0.25 0.30 8.5 mm. 2.50 3.50
4.25 mm. 0.28 0.34 9 mm. 3.00 4.20
4.5 mm. 0.34 0.41 10 mm. 3.50 4.90
4.75 mm. 0.38 0.46 11 mm. 4.41
6.20
5 mm. 0.50 0.65 12 mm. 5.66
8.00
5.5 mm. 0.61 0.79 13 mm. 7.88 11.10
6 mm. 0.75 1.00 14 mm. 9.38 13.20
6.25 mm. 0.83 1.10 15 mm. 10.79 15.20
6.5 mm. 1.00 1.40 16 mm. 13.27 18.60
7 mm. 1.25 1.80 18 mm. 15.33 21.50
7.5 mm. 1.50 2.10